Paper glazing machine



1935- w. E. BF tOWN 2,057,081

PAPER GLAZING MACHINE Filed 061;. 3, 1934 INVENTOR ATTORNEYS PatentedOct. 13, 1936 UNITED STATES PATENT OFFICE PAPER GLAZING MACHINE ing,Pa., a corporation of Pennsylvania Application October 3,

8 Claims.

My invention relates to paper glazing machines of the nature indicatedin C. M. Hallmans United States Letters Patent, No. 1,357,234, datedNovember 2, 1920, issued to the assignee of this ap- 5 plication; and,more particularly, it consists in improvements in the pressuretensioning of the reciprocated radius-bar polisher, and in theconstruction and mounting of the paper-supporting bed, whereby I amenabled to operate the machine produce a high quality glazed sheet ofuniform color and thickness throughout its entire width.

In machines of this nature, in which the polishing bar reciprocativelyswings in a radial are from its pivotal connection on a springcarrier-beam, and frictionally engages the continuously fed paperpassing over a flat supporting-bed, the primary difilculty is to securea uniform rubbing action across the entire width of the passing paper.Due to such construction the frictional pressure of the polishing barvaries across the width of the paper, with its greatest pressurenormally exerted in its vertical position midway of its reciprocalswings, the diminishing pressure toward each edge of the paper exertingless glazing action with resultant lack of uniformity of surface colorand uneven paper thickness.

The Hallman patent referred to above, provided means for more equallydistributing the pressure of the radius bar polisher, but I have foundin practice, that when the speed of operation is increased as desirablefor increased economical production, a material change occurs in thepoints of greatest pressure of the radially swinging pressure bar. Suchvariance in pressure, is most clearly discernible in piled-up sheets ofthe differently produced papers,those prov.duced by slow movement of thepolisher bar sagging midway of the paper width due to the pres- .40 sureat such point reducing the thickness. of the paper; and contrary, thoseproduced by increased speed of the polisher bar, projecting upward atsuch mid-width point, with both edges sagging due to reduced thickness,clearly disclosing shifting toward such edges of the greatest pressurepoints.

This shifting of the pressure points at high speed is a demonstrablefact, which may beaccounted for by varying theories, but I havefou'ndmeans to counteract this shaft and satisfactorily ,uniformly distributethe pressure of theradius .bar, and my present improvements relatetosuch means, and will be more fully described connection with theaccompanying drawing, and the at a greatly increased speed andeconomically 1934, Serial No. 746,684

novel features thereof set forth in the appended claims.

Fig. 1 indicates diagrammatically, in front elevation, a machine of thenature shown in said Hallman Patent No. 1,357,234, and discloses in 5connection therewith a prepared embodiment of my improvements forovercoming the aforesaid shift of the pressure points when the machineis operated at high speed.

Fig. 2 is an enlarged cross-section detail view, 10 taken on the line 22of Fig. 1, showing the adjustable tensioned rest for the free end of thespring pressure-beam.

Fig. 3 is an enlarged cross-sectional detail view; taken on the line 33of Fig. 1, showing the construction of the flat paper-supporting bed.

Figs. 4, 5 and 6, are diagrammatic views indicating respectively piledup sheets made by, first, slow movement of the radius-bar polisher;second, by fast movement of said polisher; and, third, by fast movementof said polisher with my improvements applied to the machine.

, The machine indicated in the drawings essentially comprises, asheretofore, a reciprocable radius bar 6 pivotally suspended at 1, from aspring carrier-beam 8, and its lower end clampingly, gripped flintingstone 9 is transversely swung, as by crank wheel l0 and pitman I I,across a width of paperfed over a flat paper-supporting bed l2. Thepaper, indicated by dotted lines [3, is progressively fed forward by anyusual means not-necessary to show, and it will be readily understoodthat best glazing action of the flinting stone requires accurateadjustment and satisfactory uniform frictional pressure of the stone 5across the entire widthof the paper to secure even glazing results onthe color coated surface and avoid uneven paper thickness. 7

. The-provisions of the aforesaid Hallman patent provided forsatisfactory results at a given speed 40 of paper feed and reciprocationof the radius-bar polisher. Without adequate provision for equalizingthe action of the radius bar, slow movement tends tothin the papermidway of its width, causing a concave surface when sheets are piled oneupon another as indicated in Fig. 4. Increase of W speed tends, asheretofore described, to shift such paper, thinning to the lateraledges, causing a convex surface in piled up sheets, as indicated in Fig.5. Neither concave nor convex sheets are satisfactory especially whenthe paper is intended to be fed to automatic printing presses.

Fig. 6 indicates desirable fiat piling up of satisfactorily-uniformlytreated sheets, and whatever explanation may be advanced to account foractual shifts of the pressure points at increased speeds, I have foundthat such satisfactory results may be practically secured at speedincrease approximately one-third or more than that heretofore foundpractical, by employment of my machine improvements, the preferredembodiment shown in the drawing, and now to be fully described,comprising a counter-acting tensioning means or resilient rest for oneend of the spring carrier-beam, and a resilient surface and specialmounting for the flat paper-supporting bed.

Adjustable frictional pressure of radius bar 6 is provided, asheretofore, by tension applied, as by screw-jack l5, to carrier-beam 8,intermediate its length, and one end of said bar, held in a fixedsupporting bracket I6, and the radius-bar pivotal connection I, securedadjacent the other end of said bar. At the radius-bar end of said beam8, heretofore left free to vibrate, I have shown in the drawing aresilient support in the form of a fixed carrier-bracket 11, having avertical slide-way for a beam rest plate l8, movably held in contactwith the under side of said vibrating beam-end by resilient means, shownas springs I9 engaging between said plate l8 and a platform 20adjustable, as by screw 2|, relative to plate I8 to regulate the tensionof said springs IS.

The actual and demonstrable shift of excess pressure of the radius-barpolisher from midway to the lateral edges of the paper, when the speedof operation is increased, is probably best accounted for by reboundingtendency of the more frequently vibrated beam-end, and perhaps a pushand pull influence through the pitman reciprocating the radius-bar. butwhatever the cause, by resiliently supporting the vibrating beam-end, asabove described, excess pressure at the lateral edges may becounteractingly controlled. In practice I have found that by raising thespring platform by the adjusting screw 2| to increase the tension of thesprings [9, the excess pressure is moved laterally inward toward thecenter of the paper; and contrary, by weakening the springs, the excesspressure moves outwardly toward the edges of the paper.

To cooperate in the production of better output, I have found itadvantageous to reconstruct and mount the paper-supporting bed l2, whichis of a length to support the widest paper to be operated upon and anarrow width in the direction of the paper feed sufiicient only to forma support beneath the reciprocated flinting stone 9. As shown the bed isformed of a suitable length of proper-sized wood 25, thickened orintermediately reenforced on its under side for a major portion of itslength by a strip of wood 26 of similar cross-section, and its uppersurface having ends blocks 21, 21 spacedly carrying a metal strip 28upon which is preferably secured a paper or wood fibre wearing strip 29on which the paper rests; and the space between the metal strip 28 andbed wood 25 is preferably filled by a suitable strip 30 ofnon-conducting cushioning material, as cork or the like. The metal strip28, between its end supports 21, 21, tends to bend under the pressure ofthe reciprocated radius bar 6, and this bending actionis cushioned bythe resilient strip 30, which further insulates the bed wood 25 from anyheat developed by the friction of flintstandards 36, 36; said bracketshaving inclined rests 31, 31 engaging only the extreme ends of the bedwood 25, which ends may have metal wear plates if desired, and providebed-centering screws 38, 38 in the respective brackets 35, 35. Thisextreme end support of the bed 25 not only provides for maximumresilience of its paper supporting surface, but also provides for veryaccurately adjusting the position of the latter relative to thereciprocating flinting stone 9, and in practice cooperates with theresilient support for the end of the spring beam 8 to produce anequalized flinting action on the paper across the entire width of thelatter.

This improved mounting of the novel papersupporting bed I2 providing apressure yielding resistance to the action of the radius bar polisher 6reciprocatively traversing its width, I find essentially aids andcooperates with the resilient control of the spring beam vibrations, andenable me to satisfactorily secure a practical equalization of thefrictional pressure of the fiinting stone 9' across the entire width ofthe forwardly fed paper strip l3, with the result of a glazed surface ofmore uniform color and an even paper thickness, with a material increasein output at the higher speed of operation I am enabled to obtain.

The preferred embodiment of my invention above fully described, operatesin actual production with most satisfactory results, but it is obviousthat modifications of the construction described may secure equallysatisfactory results. For instance, it is conceivable that the springbeam end may be left free to vibrate, and supports of the resilientnature shown for such end, be applied instead to each end of the papersupporting bed l2 in lieu of, or in conjunction with, the inclined rests31, 31 described as supports for said bed. Other modifications may lateroccur, and it is my intention to include any such modifications that maybe developed within the spirit of my invention as set forth in thefollowing claims.

What I claim is:

1. In a machine for glazing continuously-fed paper or the likecomprising a flat paper-supporting bed, a transversely reciprocableradius-bar polisher, a spring carrier beam for the latter provided withtensioning means to regulate the pressure applied to the paper by saidpolisher, and:

ing bed, a transversely reciprocable radius-bar polisher, a springcarrier beam for the latter provided with tensioning means to regulatethe pressure applied to the paper by said polisher, and means to rapidlyreciprocate said radius bar;

means to approximately equalize the pressure of said polisher in itsmovement across said paper comprising a vibration controllingspring-tensioned support for the end of said spring carrier beam.

3. In a machine for glazing continuously-fedpaper or the like comprisinga fiat paper-supporting bed, a transversely reciprocable radius-barpolisher, a spring carrier beam for the latter provided with tensioningmeans to regulate the pressure applied to the paper by said polisher,and

means to rapidly reciprocate said radius bar; means acting on saidspring carrier beam to counteract excess pressure of said polisher atthe extremes of its reverse swings induced by its rapid reciprocation,comprising a vibration controlling adjustably tensioned spring supportfor the end of said spring carrier beam.

4. In a machine for glazing continuously-fed paper or the likecomprising a flat paper-supporting bed, a transversely reciprocableradius-bar polisher, a spring carrier beam for the latter provided withtensioning means to regulate the pressure applied to the paper by saidpolisher, and means to rapidly reciprocate said radius bar; endsupporting brackets for said paper-supporting bed having inclined restsadapted to engage only the extreme ends of said supporting bed.

5. In a machine for glazing continuously-fed paper or the likecomprising a flat paper-supporting bed, a transversely reciprocableradius-bar polisher, a spring carrier beam for the latter provided withtensioning means to regulate the pressure applied to the paper by saidpolisher, and means to rapidly reciprocate said radius bar; a resilientcushion beneath the bearing surface of said paper-supporting bed, andend supporting brackets for the latter having inclined rests adapted toengage only the extreme ends of said supporting bed.

6. In a machine for glazing continuously-fed paper or the likecomprising a fiat paper-supporting bed, a transversely reciprocableradius-bar polisher, a spring carrier beam for the latter provided withtensioning means to regulate the pressure applied to the paper by saidpolisher, and means to rapidly reciprocate said radius bar; a resilientcushion beneath the bearing surface of said paper-supporting bed,supporting brackets for the latter having inclined rests engaging onlythe extreme ends of said supporting bed, and a vibration controllingspring rest for one end 01' said spring carrier beam.

'7. In a machine for glazing continuously-fed paper or the likecomprising a fiat paper-supporting bed and a transversely reciprocatedradius bar polisher; a spring carrier beam for the latter provided withintermediate tensioning means to regulate the pressure applied to thepaper by said polisher, a fixed support for one end of said beam, and anadjustable resilient support for the opposite end of beam. 7

8. In a machine for glazing continuously-fed paper or the likecomprising a fiat paper-supporting bed and a transversely reciprocatedradius bar polisher; a spring carrier beam for the latter provided withintermediate tensioning means to regulate the pressure applied to thepaper by said polisher, a fixed support for one end of said beam, acarrier bracket for the opposite end of said beam having a springtensioned platform vertically movable in said bracket, and means foradjusting the supporting tension of said platform.

WALTER E. BROWN.

